On Mon, Mar 19, 2012 at 03:07:02PM -0700, Jeff Davis wrote: > On Mon, 2012-03-19 at 15:30 -0400, Bruce Momjian wrote: > > On Thu, Mar 01, 2012 at 02:01:31PM -0800, Lonni J Friedman wrote: > > > I've got a 3 node cluster (1 master/2 slaves) running 9.0.x with > > > streaming replication. I'm in the planning stages of upgrading to > > > 9.1.x, and am looking into the most efficient way to do the upgrade > > > with the goal of minimizing downtime & risk. After googling, the only > > > discussion that I've found of using pg_upgrade with a streaming > > > replication setup seems to be this (nearly) year old thread: > > > http://web.archiveorange.com/archive/v/9FNVlDWGQtpyWVL54jlK > > > > > > In summary, there is no way to use both pg_upgrade and streaming > > > replication simultaneously. I'd have to either use pg_upgrade and > > > then effectively rebuild/redeploy the slaves, or not use pg_upgrade, > > > and reimport all of the data. Is that still the latest status, or are > > > there other options? > > > > You can shut down all three servers, run pg_upgrade on all of them, then > > restart them as 9.1 servers. > > After running pg_upgrade on each server individually, they will have > different system IDs, and potentially different on-disk representation > of the catalogs, right? > > So how can you resume streaming without rebuilding the slaves?
Oh, wow, I never thought of the fact that the system tables will be different? I guess you could assume the pg_dump restore is going to create things exactly the same on all the systems, but I never tested that. Do the system id's have to match? That would be a problem because you are initdb'ing on each server. OK, crazy idea, but I wonder if you could initdb on the master, then copy that to the slaves, then run pg_upgrade on each of them. Obviously this needs some testing. -- Bruce Momjian <br...@momjian.us> http://momjian.us EnterpriseDB http://enterprisedb.com + It's impossible for everything to be true. + -- Sent via pgsql-general mailing list (pgsql-general@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-general
